I'm of similar opinion to yours, in either case I have never observed an ESP32 to suffer wear issues.

The data itself is stored on the external memory card. So even if the device breaks, the data is saved. Some memory cards advertise a life span of 20 years for usage in surveillance cams.

Last but not least, this should be an optional feature. Maybe a warning can be added. The miner itself will only use one of the CPUs (has two of them) so I'm curious to see how it would react with less one CPU available.